Well, I know what was killing my internet connection. My router, for some reason, my main PC is manually assigned "192.168.4.101" and my media PC is manually assigned "192.168.4.103." But for some reason, my router kept forcing "192.168.4.101" to the media PC causing an IP collision. Like, repeatedly. Over and over again.

I couldn't get the cmopany provided router to stop, so I just turned my whole house into a manual IP connection ONLY, and suddenly, everything is working better. I'd already manually assigned IPs to my main PCs, now I just gotta remember to assign manual IPs to all the other devices as I need to.